Soranthera ulvoidea Postels et Ruprecht

unilocular sorus after Setchell and Gardner 1925

Illustrations:

Sporophyte: Abbott and Hollenberg 1976, p. 197, fig. 160 (habit); Angst 1927a, pp. 273, 275, figs. 1–24 (stages in development on host); Scagel 1967, p. 105, figs. 38a, 38b (habit), fig. 38c (x-section, unilocular sorus); Setchell and Gardner 1925, pl. 39, figs. 40, 41 (x-section, unilocular sorus), pl. 83B (photo: habit); Wynne 1969a, pl. 41, figs. 10c, 10d, 10f (young plants in culture), pl. 21, fig. a (photo: habit in field), fig. f (photo: habit in culture), figs. d, e (photos: longitudinal sections, young plants in culture). Gametophyte: Angst 1926, p. 163, pl. 9, figs. 1–7 (young plants in culture), figs. 8–10 (plurilocular plants); Wynne 1969a, p. 41, fig. 10a (germlings), fig. 10b (plurilocular plants), pl. 21, figs. b, c (photos: germlings)

Pacific Coast Distribution:

Attu I., Aleutian Is., Alaska (Miller 4010 in UC) to 3 km E of Government Point, Santa Barbara Co., Calif. (Silva 5450 in UC); Channel Is., Calif. (Santa Rosa I.: Silva 3243 and 3300 in UC); Baja Calif. (Punta San José and Campo de Enmedio: R. Aguilar Rosas et al. 1984, p. 162)

Life History:

alternation of heteromorphic phases, with zoospores from unilocular sporangia on macroscopic epiphytic sporophytes giving rise to microscopic filamentous gametophytes bearing plurilocular gametangia; isogamous (Wynne 1969a, pp. 39–42; Angst 1926)

Chromosomes:

Cole 1962, p. 314

Phenology:

sporophytes annual, appearing and reproducing in winter in the south (December in Baja Calif.), progressively later (spring) in the north

Biology/Ecology:

Lüning and Freshwater 1988, p. 312; D'Antonio 1985, p. 204; Scagel 1961, p. 528; Rigg and Miller 1949; Angst 1926

Morphology:

Angst 1927a